README: mark ubuntu24 as beta (#9849)

README.md

@@ -21,7 +21,7 @@ To build a VM machine from this repo's source, see the [instructions](docs/creat
 
 | Image | YAML Label | Included Software | Rollout Status of Latest Image Release |
 | --------------------|---------------------|--------------------|--------------------|
-| Ubuntu 24.04 | `ubuntu-24.04` | [ubuntu-24.04] | ![Endpoint Badge](https://img.shields.io/endpoint?url=https%3A%2F%2Fgist.githubusercontent.com%2Fmikhailkoliada%2F35b243dd6e217d041fe3dfa5b4e2e2ed%2Fraw%2Fubuntu24.json) |
+| Ubuntu 24.04 <sup>beta</sup> | `ubuntu-24.04` | [ubuntu-24.04] | ![Endpoint Badge](https://img.shields.io/endpoint?url=https%3A%2F%2Fgist.githubusercontent.com%2Fmikhailkoliada%2F35b243dd6e217d041fe3dfa5b4e2e2ed%2Fraw%2Fubuntu24.json) |
 | Ubuntu 22.04 | `ubuntu-latest` or `ubuntu-22.04` | [ubuntu-22.04] | ![Endpoint Badge](https://img.shields.io/endpoint?url=https%3A%2F%2Fgist.githubusercontent.com%2Fmikhailkoliada%2F35b243dd6e217d041fe3dfa5b4e2e2ed%2Fraw%2Fubuntu22.json) |
 | Ubuntu 20.04 | `ubuntu-20.04` | [ubuntu-20.04] | ![Endpoint Badge](https://img.shields.io/endpoint?url=https%3A%2F%2Fgist.githubusercontent.com%2Fmikhailkoliada%2F35b243dd6e217d041fe3dfa5b4e2e2ed%2Fraw%2Fubuntu20.json) |
 | macOS 14 | `macos-latest-large` or `macos-14-large`| [macOS-14] | ![Endpoint Badge](https://img.shields.io/endpoint?url=https%3A%2F%2Fgist.githubusercontent.com%2Fmikhailkoliada%2F35b243dd6e217d041fe3dfa5b4e2e2ed%2Fraw%2Fmacos-14.json) |